Event: Hammersmith Rockhammer Cup

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Opponent Rating Result
Laurie Mackellar 1563 0 - 1
Laurie Mackellar 1563 0 - 1
Harry Bryant 1572 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1433 = (4698 + 400 * (1 - 2)) / 3)

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